摘要:
Sorafenib (Nexavar, BAY43-9006, 1) is a second-generation, orally active multikinase inhibitor that is approved for the treatment of some cancers in patients. In this Letter, we developed [C-11] 1 as a novel positron emission tomography (PET) probe, and evaluated the influence of ABC transporters-mediated efflux on brain uptake using PET with [C-11] 1 in P-glycoprotein (P-gp)/breast cancer resistance protein (Bcrp) knockout mice versus wild-type mice. [C-11] 1 was synthesized by the reaction of hydrochloride of aniline 2 with [C-11] phosgene ([C-11] COCl2) to give isocyanate [C-11] 6, followed by reaction with another aniline 3. Small-animal PET study with [C-11] 1 indicated that the radioactivity level (AUC(0-60) (min), SUV x min) in the brains of P-gp/Bcrp knockout mice was about three times higher than in wild-type mice. (C) 2011 Elsevier Ltd. All rights reserved.